@CHARSET "UTF-8";
 html,body {
            width: 100%;
            height: 100%;
            margin: 0;
            padding: 0;
        }
        .content {
           
            height: 300px;
            margin: 0 auto; /*水平居中*/
            position: relative; /*脱离文档流*/
            top: 30%; /*偏移*/
            transform: translateY(-30%);
        }
        .panel{
        	margin-top:50px;
        }